Omron CP - PROGRAMMING MANUAL 05-2007 - Page 476

443
Logic Instructions Section 3-12
Description XORW(036) takes the logical exclusive OR of data specified in I
1
and I
2
and
outputs the result to R.
• The logical exclusive OR is taken of corresponding bits in I
1
and I
2
in suc-
cession.
• When the content of corresponding bits of I
1
and I
2
are different, a 1 will
be output to the corresponding bit of R and when there are different, 0 will
be output to the corresponding bit in R.
I
1,
I
2
+ I
1,
I
2
→ R
Flags
Precautions When XORW(036) is executed, the Error Flag will turn OFF.
If as a result of the OR, the content of R is 0000 hex, the Equals Flag will turn
ON.
If as a result of the OR, the leftmost bit of R is 1, the Negative Flag will turn
ON.
DM Area D0 to D32767
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants #0000 to #FFFF (binary) ---
Data Registers DR0 to DR15
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Area I
1
I
2
R
I
1
I
2
R
110
101
011
000
Name Label Operation
Error Flag ER OFF
Equals Flag = ON when the result is 0.
OFF in all other cases.
Negative Flag N ON when the leftmost bit of R is 1.
OFF in all other cases.